3. Pope Francis arrived in South Korea on Thursday to begin a 5-day trip to the country. North Korea fired three projectiles shortly before what marks the first papal visit to South Korea in 25 years.

4. Protests in Ferguson, Missouri, where an unarmed teen was fatally shot by a police officer last week, have intensified in the fifth day with police unleashing tear gas and rubber bullets on demonstrators. Two journalists were also arrested Wednesday, though later released without any charges.

6. The Canadian scientists behind an experimental Ebola vaccine said they would be able to produce "tens of thousands of vaccine doses" within the next two months, Reuters reported. There is currently no registered drug for the treatment of Ebola. The virus has claimed more than 1,000 lives in West Africa.

9. The Russian-language Twitter account of Russian Prime Minister Dmitry Medvedev was hacked early Thursday morning. The first tweet from @MedvedevRussia that raised suspicion read: "Resign. Ashamed of the actions of the government. I'm sorry."

10. A Russian convoy of trucks carrying food, generators, and other aid continues to head toward a region of Ukraine largely controlled by pro-Russian militants. Ukraine officials "say they fear the mission may be a cover for an invasion," the Associated Press said.

And finally..

In unfortunate news, a new study said the biggest fish in the Amazon is on the brink of extinction. The arapaima can weigh more than 400 pounds and grow up to 10 feet in length.